package com.sky.service.impl;

import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;


import org.apache.commons.lang.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.math.BigDecimal;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

@Service
public class ReportServiceImpl implements ReportService {


    @Autowired
    OrderMapper orderMapper;

    @Autowired
    UserMapper userMapper;

    @Autowired
    WorkspaceService workspaceService;




    @Override
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> list = new ArrayList<>();
        List<BigDecimal> list1 = new ArrayList<>();
        list.add(begin);
        while(!begin.equals(end)){ //将从开始到结束的日期装入集合
            begin = begin.plusDays(1);
            list.add(begin);
        }
        String dateList = StringUtils.join(list, ",");

        //计算每一天的营业额
        for (LocalDate localDate : list) {
            LocalDateTime beginTime = LocalDateTime.of(localDate, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(localDate, LocalTime.MAX);

            List<BigDecimal> list2 = orderMapper.getByDate(beginTime,endTime);
            BigDecimal sum = BigDecimal.valueOf(0);
            for (BigDecimal bigDecimal : list2) {
                sum = sum.add(bigDecimal);
            }
            list1.add(sum);
        }
        String turnoverList = StringUtils.join(list1, ",");



        return new TurnoverReportVO(dateList,turnoverList);
    }

    @Override
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> list = new ArrayList<>();
        list.add(begin);
        while (!begin.equals(end)){
            begin = begin.plusDays(1);
            list.add(begin);
        }
        String datelist = StringUtils.join(list,",");

        List<Integer> totalUserList1 = new ArrayList<>();
        List<Integer> newUserList1 = new ArrayList<>();





        for (LocalDate localDate : list) {
            LocalDateTime beginTime = LocalDateTime.of(localDate,LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(localDate,LocalTime.MAX);
            Map map = new HashMap();
            map.put("end",endTime);

            Integer totalUserNums = orderMapper.getByCreateTime(map);
            totalUserList1.add(totalUserNums);

            map.put("begin",beginTime);

            Integer newUserNums = orderMapper.getByCreateTime(map);
            newUserList1.add(newUserNums);
        }
        String totalUserList = StringUtils.join(totalUserList1,",");
        String newUserList = StringUtils.join(newUserList1,",");




        return new UserReportVO(datelist,totalUserList,newUserList);
    }

    @Override
    public OrderReportVO getOrderStatistics(LocalDate begin, LocalDate end) {
        //日期列表
        List<LocalDate> list = new ArrayList<>();
        list.add(begin);
        while(!begin.equals(end)){ //将从开始到结束的日期装入集合
            begin = begin.plusDays(1);
            list.add(begin);
        }
        String dateList = StringUtils.join(list, ",");

        //有效订单数列表
        List<Integer> list1 = new ArrayList<>();
        for (LocalDate localDate : list) {
            LocalDateTime beginTime = LocalDateTime.of(localDate,LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(localDate,LocalTime.MAX);
            Integer byDate = orderMapper.getByDate1(beginTime, endTime);
            list1.add(byDate);

        }
        String validOrderCountList = StringUtils.join(list1, ",");


        //有效订单数总数
        Integer validOrderSum = 0;
        for (Integer i : list1) {
            validOrderSum += i;
        }

        //订单数列表
        List<Integer> list2 = new ArrayList<>();
        for (LocalDate localDate : list) {
            LocalDateTime beginTime = LocalDateTime.of(localDate,LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(localDate,LocalTime.MAX);
            Integer byDate = orderMapper.getByDate2(beginTime, endTime);
            list2.add(byDate);

        }
        String orderCountList = StringUtils.join(list2, ",");

        //订单数总数
        Integer orderSum = 0;
        for (Integer i : list2) {
            orderSum += i;
        }

        //比率
        Double rate =  ((double)validOrderSum / (double)orderSum);





        return OrderReportVO.builder().
                dateList(dateList).
                orderCompletionRate(rate).
                orderCountList(orderCountList).
                totalOrderCount(orderSum).
                validOrderCount(validOrderSum).
                validOrderCountList(validOrderCountList).
                build();
    }

    @Override
    public SalesTop10ReportVO getTopStatistics(LocalDate begin, LocalDate end) {

        LocalDateTime beginTime = LocalDateTime.of(begin,LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end,LocalTime.MAX);
        List<String> top10NameList = orderMapper.getTop10NameList(beginTime, endTime);
        String nameList = StringUtils.join(top10NameList,",");

        List<String> top10NumberList = orderMapper.getTop10NumberList(beginTime, endTime);
        String numberList = StringUtils.join(top10NumberList,",");


        return SalesTop10ReportVO.builder().nameList(nameList).numberList(numberList).build();
    }

    /**
     * 导出运营数据报表
     * @param response
     */
    public void exportBusinessData(HttpServletResponse response) throws IOException {
        //1. 查询数据库，获取营业数据---查询最近30天的运营数据
        LocalDate dateBegin = LocalDate.now().minusDays(30);
        LocalDate dateEnd = LocalDate.now().minusDays(1);

        //查询概览数据
        BusinessDataVO businessDataVO = workspaceService.getBusinessData(LocalDateTime.of(dateBegin, LocalTime.MIN), LocalDateTime.of(dateEnd, LocalTime.MAX));

        //2. 通过POI将数据写入到Excel文件中
        InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");

        try {
            //基于模板文件创建一个新的Excel文件
            XSSFWorkbook excel = new XSSFWorkbook(in);

            //获取表格文件的Sheet页
            XSSFSheet sheet = excel.getSheet("Sheet1");

            //填充数据--时间
            sheet.getRow(1).getCell(1).setCellValue("时间：" + dateBegin + "至" + dateEnd);

            //获得第4行
            XSSFRow row = sheet.getRow(3);
            row.getCell(2).setCellValue(businessDataVO.getTurnover());
            row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessDataVO.getNewUsers());

            //获得第5行
            row = sheet.getRow(4);
            row.getCell(2).setCellValue(businessDataVO.getValidOrderCount());
            row.getCell(4).setCellValue(businessDataVO.getUnitPrice());

            //填充明细数据
            for (int i = 0; i < 30; i++) {
                LocalDate date = dateBegin.plusDays(i);
                //查询某一天的营业数据
                BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));

                //获得某一行
                row = sheet.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData.getTurnover());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());
            }

            //3. 通过输出流将Excel文件下载到客户端浏览器
            ServletOutputStream out = response.getOutputStream();
            excel.write(out);

            //关闭资源
            out.close();
            excel.close();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }

}
